PFCP Session Establishment not going to upf when running through the command run.sh(running the whole core network)

Hi,
I have downloaded and built the code from git repo(https://github.com/free5gc/free5gc).
After firing the command run.sh, I cannot see PFCP session establishment going to UPF. I can see only Association Request message going to UPF.
However, running the test example like (./test.sh TestRegistration), I can see both Association and Session Establishment Message going to UPF.
So can you please guide me how to resolve this issue?
Actually I want to perform some test with all the network up and initial attach done.

You need to have UE attach to trigger PFCP Session Establishment.

Such like this on call flow No.10.

ref: https://itectec.com/spec/5-2-2-message-flows-2/

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